feat: init

Dockerfile

@@ -0,0 +1,7 @@
+FROM alpine:3
+
+RUN apk add --no-cache bind-tools curl
+
+COPY entrypoint.sh /
+
+ENTRYPOINT /entrypoint.sh

Jenkinsfile

@@ -0,0 +1,39 @@
+pipeline {
+  environment {
+    registry = 'https://registry.hub.docker.com'
+    registryCredential = 'dockerhub_jcabillot'
+    dockerImage = 'jcabillot/dynhost'
+  }
+
+  agent any
+
+  triggers {
+    cron('@midnight')
+  }
+
+  stages {
+    stage('Clone repository') {
+      steps{
+        checkout scm
+      }
+    }
+
+    stage('Build image') {
+      steps{
+        sh 'docker build --force-rm=true --no-cache=true --pull -t ${dockerImage} .'
+      }
+    }
+
+    stage('Deploy Image') {
+      steps{
+        script {
+          withCredentials([usernamePassword(credentialsId: 'dockerhub_jcabillot', usernameVariable: 'DOCKER_USER', passwordVariable: 'DOCKER_PASS')]) {
+            sh 'docker login --username ${DOCKER_USER} --password ${DOCKER_PASS}'
+            sh 'docker push ${dockerImage}'
+          }
+        }
+      }
+    }
+  }
+}
+

entrypoint.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env sh
+
+# Account configuration
+#HOST=
+#LOGIN=
+#PASSWORD=
+
+# Get current IPv4 and corresponding configured
+HOST_IP=$(dig +short $HOST A)
+CURRENT_IP=$(curl -m 5 -4 ifconfig.co 2>/dev/null)
+if [ -z $CURRENT_IP ]
+then
+  CURRENT_IP=$(dig +short myip.opendns.com @resolver1.opendns.com)
+fi
+CURRENT_DATETIME=$(date -R)
+
+# Update dynamic IPv4, if needed
+if [ -z $CURRENT_IP ] || [ -z $HOST_IP ]
+then
+  echo "[$CURRENT_DATETIME]: No IP retrieved"
+else
+  if [ "$HOST_IP" != "$CURRENT_IP" ]
+  then
+    RES=$(curl --silent --show-error -m 5 -L --location-trusted --user "$LOGIN:$PASSWORD" "https://www.ovh.com/nic/update?system=dyndns&hostname=$HOST&myip=$CURRENT_IP")
+    echo "[$CURRENT_DATETIME]: IPv4 has changed - request to OVH DynHost: $RES"
+  fi
+fi